The paper introduces a 24-channel air-trench isolated Silica-based VOA array. The air trenches thermally insulate the VOAs with etched-free waveguide technologies. Reactive ion etching and wet etching were used at different channel locations to suppress thermal crosstalk and reduce power consumption. https://www.bekindtopets.com/flash-price-NBA-San-Antonio-Spurs-Canvas-Google-Pixel-5-Clear-Case-p44255-save-extra/